@function color($key) {
  @if map-has-key($colors, $key) {
    @return map-get($colors, $key);
  }

  @warn "Unknow `#{$key}` in colors.";
  @return null;
}

@function theme-color($key) {
  @if map-has-key($theme-colors, $key) {
    @return map-get($theme-colors, $key);
  }

  @warn "Unknow `#{$key}` in theme-colors";
  @return null;
}
